External HDD Western Digital Elements 2TB drive heads replacement

I am looking for an HDD hardware technician to replace the heads on my Western Digital Elements 2TB external drive with experience of having done this before. I believe the drive is currently being affected by mechanical failure, light is flashing but heads are constantly clicking. I need the technician to source heads required for the replacement from another spair old drive. If the condition of the drive and the results of the heads repair are OK, I am capable of copying HDD data to my own SSD myself. I am based in the UK. Please provide your proposal that includes price, time, logistics, proof/track record of similar HDD repair done. Many thanks.